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@mopemope mopemope/gist:196450
Created Sep 29, 2009

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import timeit
from cStringIO import StringIO
x1 = xrange(1000)
x2 = xrange(10000)
smallbuf = "buffer"
bigbuf = "buffer" * 1024
def str_join1000(buf):
lst = []
for i in x1:
lst.append(buf)
return ''.join(lst)
def string_io1000(buf):
io = StringIO()
write = io.write
for i in x1:
write(buf)
return io.getvalue()
def map1000(buf):
lst = map(lambda x:buf, x1)
return ''.join(lst)
def str_join10000(buf):
lst = []
for i in x2:
lst.append(buf)
return ''.join(lst)
def string_io10000(buf):
io = StringIO()
write = io.write
for i in x2:
write(buf)
return io.getvalue()
def map10000(buf):
lst = map(lambda x:buf, x2)
return ''.join(lst)
res = timeit.timeit("str_join1000(buf)", "from __main__ import str_join1000, smallbuf as buf", number=1000)
print "small string_join x 1000: %f" % res
res = timeit.timeit("string_io1000(buf)", "from __main__ import string_io1000, smallbuf as buf", number=1000)
print "small string_io x 1000: %f" % res
res = timeit.timeit("map1000(buf)", "from __main__ import map1000, smallbuf as buf", number=1000)
print "small map x 1000: %f" % res
res = timeit.timeit("str_join10000(buf)", "from __main__ import str_join10000, smallbuf as buf", number=1000)
print "small string_join x 10000: %f" % res
res = timeit.timeit("string_io10000(buf)", "from __main__ import string_io10000, smallbuf as buf", number=1000)
print "small string_io x 10000: %f" % res
res = timeit.timeit("map10000(buf)", "from __main__ import map10000, smallbuf as buf", number=1000)
print "small map x 10000: %f" % res
res = timeit.timeit("str_join1000(buf)", "from __main__ import str_join1000, bigbuf as buf", number=1000)
print "big string_join x 1000: %f" % res
res = timeit.timeit("string_io1000(buf)", "from __main__ import string_io1000, bigbuf as buf", number=1000)
print "big string_io x 1000: %f" % res
res = timeit.timeit("map1000(buf)", "from __main__ import map1000, bigbuf as buf", number=1000)
print "big map x 1000: %f" % res
res = timeit.timeit("str_join10000(buf)", "from __main__ import str_join10000, bigbuf as buf", number=1000)
print "big string_join x 10000: %f" % res
res = timeit.timeit("string_io10000(buf)", "from __main__ import string_io10000, bigbuf as buf", number=1000)
print "big string_io x 10000: %f" % res
res = timeit.timeit("map10000(buf)", "from __main__ import map10000, bigbuf as buf", number=1000)
print "big map x 10000: %f" % res
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